On average, public debt rose from 60% of GDP on the eve of the crisis (end-2007) to almost 75% by end-2009. IMF country teams project debt ratios to continue rising over the next five years, averaging more than 85% of GDP by 2015. Japanâs public debt is expected to reach nearly 200% of GDP in 2010.
Ependymal Cells [edit]. The ependyma is made up of ependymal cells, ependymocytes, a type of glial cell. These cells line the CSF-filled ventricles in the brain and the central canal of the spinal cord. The cells are ciliated simple columnar epithelium-like cells.heir apical surfaces are also covered with microvilli, which absorb CSF. Ependymal cells also produce CSF. Within the ventricles of the brain, a population of modified ependymal cells and capillaries together form a system called the choroid plexus, which produces the CSF.
There are four choroid plexuses in the brain, one in each of the ventricles. The CP consists of a layer of cuboidal epithelial cells surrounding a core of capillaries and loose connective tissue.